Biden's inability to function as a human being has been apparent almost since the outset of his term, and has been growing steadily more apparent throughout. If his incompetence was the reason for his replacement, it would have been signaled to the public a year ago, where they can control the messaging and get in a competent pick to properly run a convincing campaign.

My take is that they were betting on removing Trump from the ticket one way or the other. With him forced out, the Republicans would get in one of their people (be it Nikki Hayley or someone else), who would beat Biden, and the pseudo two party system would reestablish it's hold.

One Mar-a-Lago raid, 30 felony convictions, and one assasination attempt later, and the Democrat side of the American mafia has run out the clock, and is being forced to make a Hail Mary.

Not sure what the issue is though, honestly. Can't they just cheat like they did last time?